133613445 has 24 divisors (see below), whose sum is σ = 248685984. Its totient is φ = 61080096.

The previous prime is 133613419. The next prime is 133613507. The reversal of 133613445 is 544316331.

It is not a de Polignac number, because 133613445 - 2⁵ = 133613413 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 90159 + ... + 91628.

It is an arithmetic number, because the mean of its divisors is an integer number (10361916).

Almost surely, 2^133613445 is an apocalyptic number.

133613445 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

133613445 is a deficient number, since it is larger than the sum of its proper divisors (115072539).

133613445 is a wasteful number, since it uses less digits than its factorization.

133613445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181809 (or 181802 counting only the distinct ones).

The product of its digits is 12960, while the sum is 30.

The square root of 133613445 is about 11559.1282110720. The cubic root of 133613445 is about 511.2304583807.

Adding to 133613445 its reverse (544316331), we get a palindrome (677929776).

The spelling of 133613445 in words is "one hundred thirty-three million, six hundred thirteen thousand, four hundred forty-five".